CELLULOSE ESTER PRODUCTION PROCESS Russian patent published in 2002 - IPC

FIELD: cellulose derivatives production. SUBSTANCE: starting wood is treated with acylation mixture including trifluoroacetic acid to give desired product, which can be used in production of plastics, films, and varnishes. Novelty consists in adding, to acylation mixture, carboxylic acid with 1-7 carbon atoms in alkyl chain and thionyl chloride at molar ratio carboxylic acid/ thionyl chloride/trifluoroacetic acid (0.020-0.030): (0.020-0.065): (0.14-0.20). Product is extracted with methanol and treated with peracetic acid. EFFECT: simplified process and reduced intake of expensive trifluoroacetic acid. 5 tbl, 21 ex